(I am in the drive through lane because I am delivering a forgotten hat to a roommate that works there. I rattle off my order and pull forward. I then notice that a truck, that for whatever reason has shut down in the other drive through lane, has turned on and I am unsure whether I have accidentally cut him off.)

Me: “Uhm, I am the one with the [order].”

(The cashier takes my credit card and pushes a couple buttons.)

Me: “And could I pay for the guy-behind-me’s order? I think I cut him off.”

Cashier: “Uh… hold on.”

(She goes to the back to confer with the manager, and then pops back.)

Cashier: “Yeah, one moment.”

(She runs my card twice. I receive both receipts, deliver the hat to my roommate, get my food and then drive off. Later that night, my roommate comes home.)

Roommate: “So, apparently you set off a chain reaction. The rest of the cars in the line started to pay for the next one. [Coworker] was so relieved when it stopped! It was so confusing!”